Friction-driven truck.



No. 702,025. Patented :une lo, |902.

J. F. mcELRnY.

FRICTIUN DRIVE TRUCK.

' (Application med Dec, 15, 14.898.)

2 Sheets-Sheet I.

(No Model.)

h/Zwsee was M No. 702,025. Patented lune l0, |002.

J. F. m-csLov.

f rmcnou nmvsnvrucx.

(Applicltion led Dec. 15, 1598.)

- 2 Sheets-#Sheet 2.

UNITED STATES PATENT (V)EEICE.v

JAMES E. MCELROY, OE ALBANY, NEW YORK, ASSIGNOR TO CONSOLIDATEDOAR-HEATINGr COMPANY, OE ALBANY, NEW YORK, A CORPORATION OE WESTVIRGINIA. Y

FFilCTION-DRIVEN TRUCK.

SPECIFICATION forming part of Letters Patent No. 702,025, dated June 1Q,1902. Application iiled December 15l 1898. Serial No. 699,363. (Nomodel.)

To all whom it may concern: and provided with an interposing spring h Beit known that I, JAMES F. MCELROY, a within said projection H, thetendency of said citizen of the United States of America, and springbeing to draw together the pedestals, v a resident of Albany, in thecounty of Albany and therefore the drive-wheels. The rod G 5 and Stateof NewYork, have invented certain and the spring connection form ameansof 5 5 new and useful Improvements in Frictiondrawing the drive-wheelsin contact with the Driven Trucks, of which thegfollowing is afriction-rollersufficient toovercomethe tractspecification. Y ive eectof the drive-wheels on the track My invention relates to friction drivenwhen there is no car-body or load placed on Io trucks; and the' objectof my invention is to the truck. v `6ol provide a truck adapted forpropulsion by an On each sideof the truck and to each of thel electricor other motor by means of a frictionparts A and B of the frame I secureplates J J, rollerin contact with the drive-wheels so con-- saidplates'J J slightly separated from each structed that the weight of thecarbody and other'and presenting two adjacent faces ilar- I5 load willexert a pressure upon the frictioning upward and outward from eachother.Fit- 65 roller of the drive-wheels in proportion to the ting betweensaid adjacent faces of the plates weight of said car-body and load. Iattain this J J on each side of the truck I arrange a Wedge- Object bymeans of the mechanism illustrated shaped block K, suitably mounted tothe supin the accompanying drawings, in whichport L. The braces L aresecuredto the castzo Figure l is a plan, partly in section; and ing Landextend to the bottom of the car, to 7c Fig.2 is an elevation, partlyinsection. Fig. which they are connected by means of the 3 is across-section with parts omitted, showking-bolt L2, thus carrying theear-body. The ing in detail the support for the wedge-shaped support Lis a casting to which on each side blOckKand the mannerof unitingthebraces is attached an arm 5 5, which is boltedior 2'5 M. Fig. 4 is adetail view showing the conotherwise secured to the braces M M, respec-75 nection of the wedge K in reference to the tively. .The portion ofthe casting L com- Overlapping side pieces A B and itsY relation prisedwithin the angle made bythe arms 5 5 is to the car-support. l adapted tocontain a spring or series ofsprings Similar characters refer to similar`parts 6. Forming part of the support for the oar- 3o throughout theseveral views. body I arrange the braces M M, extending-8o I arrange adouble interlockingf rame contoward the ends and center of the truck andsisting of two parts Aand B, to each of which capable'of movement uponthe parts A and parts is mounted a pair of drive-wheels C D. B ofthetruck-frame, said braces beingsuit- Thepedestals C D', in which saiddriveably secured together at the front and rear 3 5 wheels are mounted,are secured to their reof the truck by means of the locking-plates 85spective frames by means of bolts, as shown m m or in anysuitable-manner.` The fricin Fig. 2, o r in any suitable manner. Withintion-roller is mounted upon the shaft f and the pedestals CD,respectively, I preferably operated by a motor. (Not shown.) As thusarrange a springE E for the purpose of allowarranged it is apparent thatthe weight of the 4o ing a slight give between the drive-wheelscar-body' and -load will tend to depress the 9o and the friction-rollerF, placed between them, wedge-shaped-block K between the plates J Jsuficient to allow a slight horizontal play in on each side of thetruck, and as on each side case dirtor gravel should be wedged betweenof the truck there isr a plate attachedto each the drive-Wheels and thefriction-roller. of the two parts composing the frame of the 45 Attachedto one of the pedestals D on each ltrucky and a pair of wheels securedto each of 9'5 side ofthe car I secure, by means of a nut'or said.portions of the frame the operation of in any other suitable manner, oneend of the the wedge will be to cause .the two portions rod G,'theOpposite end of which is preferof the frame to interlock and the wheelsto ably secured within a projection H, secured' be drawn in closercontact with the friction- 5o to the pedestal C on the same side of thecar roller placed between them. v v roo The construction of truckdescribed herein is very simple and the means for keeping thedrive-wheels in contact with the friction-roller are positive,regardless of the amount of load that is carried thereon. Thearrangement of the pedestals with the springs E E, allowing for a Veryslight give between the drive-wheels and the roller, will allow for dirtgetting between the drive-wheels and the rollenwithout making itnecessary to raise the plate J and the wedge K for every slightobstruction.

What I claim as my invention, and desire to secure by Letters Patent ofthe United States, is-

1. In a car-truck, a truck-frame composed of two parts yieldinglyconnected arranged to overlap each other at the sides of the truck, withmeans for causing a slight horizontal movement of said parts inreference to each other, substantially as described.

2. In a car-truck, a truck-frame, composed of two parts yieldingly connected,overlapping each other at the sides of the truck,and bracesadapted to hold said parts in suitable relation to each other, with apair of drive-wheels mounted in each of the parts of said frame, andmeans for causing the drive-wheels to revolve by the action of a motor,substantially as described.

3. In a car-truck, a truck-frame, consisting of two parts, arranged tooverlap each other at the sides of the truck and yielding connectionsbetween the parts of said frame, with means, actuated by the weight otthe car-body and load, for causinga slight horizontal movement of theparts of said frame in reference to each other, substantially asdescribed.

4. A car-truck, consisting of a frame composed of two parts arranged tooverlap each other at the sides of the truck, apair of Wheels mounted ineach part of said frame, a friction-roller mounted to engage with two ofsaid wheels on one side ot' the truck, with a means for interlockingsaid frames, substantially as described. Y

5. In a car-truck, a frame, consisting of two parts, a pair ofdrive-wheels mounted in each part of said frame, a friction-rollermounted to rotate between and in contact with said wheels, and means forinterlocking the parts of said frame in such a manner that the weight ofthe car-body and the load will tend to draw the wheels in contact withthe frictionroller, substantially as described.

6. In a car-truck, two pairs of drive-wheels, pedestals in which saiddrive Wheels are mounted, the journal-boxes in said pedestals providedwith a resilient cushion allowing for a certain horizontal give of thedrive-wheels, the friction roller mounted between said drive-wheels, anda means for connecting the pedestals on the drive-wheels on one side ofthe carin such a manner that the drive-wheels will be drawn in contactwith the frictionroller, substantially as described.

7. In a car-truck, a frame, consisting of two parts, a pair ofdrive-wheels mounted in each part, a friction-roller mounted to rotatebetween and in contact with said drive-wheels on one or both sides ofsaid truck, a plate secured to each 'of said parts of said truckframe oneach side of the truck, each plate so arranged and located in referenceto the drive-wheels on the part of the frame carrying said plate thatpressure brought to bear upon said plate will cause said dri ve-wheelsto move toward the friction-roller, with a means, actuated by the weightof the car-body and load, for bringing pressure to bear upon saidplates, substantially as described.

8. In a car-truck, a frame, consisting of two parts, a pair ofdrive-wheels mounted in each of said parts, a friction-roller mounted torotate between and in contact with said drivewheels on one or both sidesof said truck, a plate secured to each of said parts of the frame oneach side of said truck, so arranged in reference to each other that awedge-shaped block may be placed in contact with said plates on eachside of the truck and that the weight placed on said blocks will tend tocause the parts of the frame to move upon each other, and means formounting said wedgeshaped blocks in such a manner that the weight of thecar-body and load will come upon them, substantially as described.

9. In a car-truck, a frame composed of two parts, a pair of drive-wheelsmounted in each part of said frame, a friction-roller arranged torevolve in contact with two of said drivewheels on one or both sides ofsaid truck, a plate attached to each part of said frame and on each sideof said truck, said plates arranged in reference to each other in such amanner as to allow for the entrance of awedge-shaped block betweenadjacent faces of said plates on each side of the truck, wedge-shapedblocks mounted in connection with the body of said truck adapted toengage with said plates on each side thereof, all so arranged andconnected up that the weight of the car-body and load on the car willtend to draw the parts of the frame horizontally toward eachother,substantially as described.

Signed by me at Albany aforesaid this 13th day of December, 1898.

JAMES F. MOELROY. i/Vitnesses:

A. N. A. Mol-IMG, CHAs. B. MITCHELL.

IOO

